A segment-coupling Prins cyclization was developed involving (1) esterification, (2) reductive acetylation and (3) Lewis acid promoted cyclization. A model for the bis-tetrahydropyran segment of phorboxazole was successful assembled using this new method. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
A segment-coupling Prins cyclization was developed involving (1) esterification, (2) reductive acetylation and (3) Lewis acid promoted cyclization. A model for the bis-tetrahydropyran segment of phorboxazole was successful assembled using this new method. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.